package command;

/**
 * @author shenhan
 * @create 2020/4/8 14:28
 * @description
 */
public class LightReceiver {
    public void on() {
        System.out.println(" 电灯打开了。。。");
    }

    public void off() {
        System.out.println(" 电灯关闭了。。。");
    }
}
